Fractions practice

Subtract tape-measure fractions

Find differences between fraction-only lengths using binary inch subdivisions and exact common-denominator subtraction.

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Choose a common subdivision for the two fractions. Rename both values, subtract in the printed order and simplify the difference.

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Learning objective

What this activity builds

Compare and subtract two binary fractional measurements without changing their order or units.

Worked example

A fractional length is 7/8 inch. After removing 3/16 inch, how much remains?

11/16 inch.

Seven-eighths equals fourteen-sixteenths. Removing three-sixteenths leaves eleven-sixteenths; adding the removed 3/16 back gives the starting 7/8.

Teaching notes

Make the practice count

  • Use repeated halving to relate the two denominators.
  • Check the result by restoring the removed length.
  • Keep the fraction-only task separate from mixed-inch subtraction until whole-number regrouping is understood.

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Math SheetNameScoreTeacherDate/ 10Subtracting Tape-measure FractionsSubtract exact inch fractions shown in tape-measure units.1.12-28=2.1016-416=3.12-416=4.12-18=5.38-116=6.78-1216=7.34-12=8.12-38=9.1316-68=10.34-12=math-sheet.comPage 1 / 1

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